Skin dullness develops when renewal and repair fall out of sync. Common contributors include:
Slower cell turnover
With age, keratinocyte turnover slows, leading to accumulation of surface cells that scatter light poorly.
Barrier impairment and dehydration
A weakened barrier increases transepidermal water loss (TEWL), reducing translucency and glow.
Chronic stress and poor sleep
Skin repair and renewal are partly circadian-regulated. Sleep deprivation and stress hormones disrupt this process.
Environmental exposure
UV radiation and pollution increase oxidative stress, impairing cellular function and light reflection.
Over-exfoliation and active stacking
Ironically, excessive exfoliation and irritation often worsen dullness by triggering inflammation and barrier damage.